The DC Power Pack is a DC energy storage device containing 16 individual battery pods, a thermal control system and hundreds of sensors that monitor and report on cell level performance. Direct current (DC) power uses electrons that move in a straight line. This linear movement, in contrast to ACs wave motion, gives this current its name. It is a compact self-contained unit with a control system that is used in the oil and gas industry. The DC Power Pack is very effective and useful.